Preventing collisions on railways



0.1. AKHOONA. PREVENTING COLLISIONS ON RAILWAYS.

APPLICATION FILED JUNE 23,1920.

Patented Jan 10, 1922.

2 SHEEISSHEE I.

0. J. AKH-0ONA. PREVENTING COLLISIONS 0N RAILWAYS.

APPLICATION FILED JUNE 23' 192 0.

Patented Jan. 10, 1922.

2 SHEEISSHEET 2.

PREVENTING COL-LESIONS on RAILWAYSQ mosses.

To all whom it may 0 mm.-

Be it known that I, Drive Haw JrNa oY V AKHOONA, a subject of the Emperor of In dia, residing at Bulsar, Bombay Presidency, India, have invented certain new and useful Improvements in Preventing Collisions on Railways, of which] the following is a specification. i

This invention is intended to prevent collisions on a single line of railway, by enabling each train to operat the vacuum brakes of the other train to ensure stoppage while yet at a safe distance apart.

Hitherto precautions have taken the form of signals, operated by an advancing 1000-. motive or train or otherwise which have not been reliable.

The present invention providesan automatic arrangement which acts on the vacuum brakes and stops a train at a distance from the one approaching from the opposite direction. It consists of a flat iron bar resting on roller guidesnear the inner side of both rails. Beneath the bar and aboveeach roller are wedge shaped projections so that when the bar is moved horizontally it will ris in level to the extent of about 3 inches. Bars, of suitable length are used to allow two approaching trains to come to rest under the influence of their brakes without meeting. The ends of the bars are connected by short horizontal chains passing over grooved pulleys and terminating in a vertical plunger that is actuated from above by a sloping lever whose lower end is fixed near the level of the rail and which may be depressed by a wheel or roller suspended from the front part of the engine as it passes over the lever. This wheel is connected by a rod and lever to the reversing lever of the engine so that it may be thrown out of action when the engine is backing. The automatic controlling gear is fixed on the left hand side of each engine and this acts upon the right hand side of an approaching engine. When the sliding bar is raised by one engine on its left hand side it lifts a slipper suspended from the right hand side of the approaching engine or train which slipper causes a valve or cock to open on th vacuum main and throws on th brakes.

The invention is shown on the annexed drawings in Figures 1 to 5, Figure 1 being a longitudinal elevation, Fig. 2 a plan view,

Fig. 3 a cross-sectional view, Fig. 4 a view 7 similar to Fig. 1, but showing the parts in,

i Specification of Letters Patent. I Patqgnted 1Q ig22 -pplication iiled June 23,

1920. Serial N 391,008. i v

difie'rent positionsyand Fig. 5a view of a detail. i i f Fig. 1. shows the arrangement in longitudinal elevation of the slidingbars b b,

the guid rollersg andh andithe chain rollers f, f. The chains are attached at one ndto thesliding bars 6,6, and at the other end to. the plunger d, whose upperend is jointed to the lever e, that is connected by hinges m, m, to a sleeper, see Fig.2. In Fig. 1 the sliding bar b is level with the rail aandthe bar bl is resting on a wedge shaped projection g which raises it about 3 inches above the level of the rails. The lever e is also raised.

Referring to Fig. l the same parts are in a newposition caused by the advance of the wheel 2' upon the lever e which forces it down to the level of the rails depressing the plunger and pulling the sliding bars 7), 6 into new positions. The bar Z2 is now raised about 3 inches above the level of the rails and the bar I) is correspondingly depressed. The wheel 2' is hung from a bar j suspended between the frames? of the engine and con-.

nected through A and s with thereversing lever on the footplate so that when the engine is backing the wheel a is lifted clear of all obstruction. A stop 1' bearing against the framing keeps the wheel 2' in working position. i

Fig. 5 is a slipper or suspended from a bar 0 so as to be immediately above the sliding bars I), b, it is attached to the framing of the engine or tender. and carries a rod 39 which when the slipper n is raised will open a valve or cook. on the vacuum main and apply the brakes. Thus with the bar 6 in position as shown in Fig. 4 the slipper of the advancing train (on the left) would be raised on coming in contact with the bar I) and would apply the brakes of that train. The two trains approaching would act reciprocally and stop each other.

Fig. 2 is a plan of the inventlon showing the lever ethe sliding bars 6,- b the rollers f, 9, hand the rails a in their respective positions, The direction in which the device acts in the approaching trains is indicated by arrows, Fig. 2. Fig. 3 is a cross section of the line throu h centres of rollers g and f show-mg t e brackets on which they are carried and their bed on the longitudinal sleepers Z. With the aid of the above invention an engine 1s the inner side of the rails, means connecting the said bars, an intermedlate member betvveen'the said bars lncludedin saldeonnecting means, and an actuating member for said intermediate member so arrengedas to move and s multaneously raise either of said bars above the level of therails when engaged by a part of a train passing over said rails for the purpose described. 7

2. In the-combination as specified in claim tionson the latter for raising them above the level of the rails, asthe said bars are moved s longitudinally. y 7

In testimony whereofl have signed my name to thisspecification in thepresence of two subseribing witnesses. I V

nmsunw JlNABHOY AKHOONA.

' HILDA V. LYNCH,

EMMA E; SI-IARMAN.

'1, roller guides for said bars, and nprojec- 

